Table 2.

Predictive performance of three machine learning models.

ACC of Classification	Validation Set	Deep Radiomics	Deep Learning	Radiomics
2-category	Internal	0.8776	0.8622	0.8827
	External	0.9063	0.8527	0.8973
3-category	Internal	0.8061	0.8112	0.7908
	External	0.7143	0.7366	0.7054
6-category	Internal	0.4796	0.4031	0.3724
	External	0.4554	0.4241	0.4375
8-category	Internal	0.4643	0.4235	0.3520
	External	0.4643	0.4286	0.4464
C-index of prognosis models (95%CI)	Internal	0.892(0.846–0.937)	0.836(0.765–0.906)	0.854(0.792–0.917)
	External	0.835(0.774–0.896)	0.800(0.709–0.891)	0.840(0.786–0.894)

Abbreviations.

ACC, accuracy; CI, Confidence Interval.